亿堆数字把我整懵逼了

#include<bits/stdc++.h>
using namespace std;
int main()
{
	long long n,a,b,c;
	cin>>n;
	a = n/100000000*100 + n/10000000%10*10 + n/1000000%10;
	b = n/100000%10*100 + n/10000%10*10 + n/1000%10;
	c = n/100%10*100 + n/10%10*10 + n%10;
	cout<<a*b*c;
	return 0; 
}